chago



F. H. CRA GO.

PUMP. APPLICATIO N FILED JULY30, I919.

Patented Nov. 25, 1919.

2 SHEETSSHEEI I.

F. H. CRAGO.

PUMP.

APPLICATION FILED JULY30| I919.

Patented Nov. 25, 1919.-

2 SHEET.8SHEET 2.-

wueutoz atmnup FELIX. H. ORAGO, on HOT srnrnes, MONTANA.

PUMP. Y

To all whom it may concern: 7

Be it known that I, FELIX H. YCI .Aco, a citizen of the United States, residing at Hot Springs, in the county of Sanders and State of Montana, have invented a new and useful Pump, of which the following is a specification.

It is one object of this invention to improve generally and to enhance the utility of pumps of that type embodying a stator,

a rotor journaled in the stator, and piston slidable in the rotor and cotiperating with the stator Specifically, the invention aims to provide novel means for advancing the blade portion of the piston, automatically, to cause the blade port-ion of the piston to ,cooperate with. the stator, thereby conpensat ing for wear. I y

Other and further objects of the invention will be made manifest as the description progresses. j

' Witlrthe above. and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the de tails of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made Without departingfrom the spirit of the invention.

In the drawings v Figure 1 is a sectional view disclosing a pump embodying the invention, the cutting plane being coincident with the axis of rotation of the rotor, parts remaining in elevation; Fig. 2 is a section on the line 2-2 of Fig. 1; Fig. 3 is a section on the line 3-3 of Fig. 1.

In carrying out the invention there is provided a stator, denoted generally by the numeral 1, the stator including a side plate 2 carried by abase 3 having a standard 4 provided with a bearing 5 carrying an oil cup 6. The side plate 2 carries a ring 7. A first recess 8 is fashioned in the side plate 2, the recess 8 communicating with a recess 9 of less diameter than the recess 8, the recess 9 being formed in a hub 50, constituting a part of the side plate 2. A sleeve 10 projects from the hub 50 and carries an oil cup 11 discharging into an oil duct 12formed in a bearin 14 engaging a packing 15 located within the sleeve 10, the bearing 14 being connected with some part of the side plate 2 by means of securing devices 16, the

Specification of Letters Patent. Patented N 25, 1919 Appl ic ationfiled. July so, 1919. semi no. 314,266.

parts 16, 15 and 14 constituting nothing more or less than a common gland.

' The stator 1 embodies a side plate 17, this plate andthe plate 2 being'provided with cooperating bosses 18 receiving securing elements 19 whereby the side plate 17' is bound against'the edge of the ring portion 7 of the plate 2, the parts 17, 2 and 7defining a chamber 20. The ring portion 7 of the stator is supplied with ports 21 and 22 communicating with the chamber 20. i

Near to its peripheryythe side plate 17 is provided with an internal annular groove 23, and there isa' recess 24 in the plate 17, adjacent to the center thereof. The side plate 17 carries an outwardly projecting sleeve 25 supplied with 'an'oil cup 26 discharging into 'a duct27 formed in a bushing 28 located within the sleeve. A screw 29 is threaded into the end of the sleeve 25 and engages the bushing 28, for the purpose a lock nut 30.

A drive shaft 31 is journaled for rotation in the bearing5 and in the bearing 14. A rotor 32 is located within the stator 1 and includes a hub 33 received for rotation in thehub 50 of the side plate 2. Theinner end of the drive shaft 31 enters the hub 33 of the rotor 32 and is held'therein by a trans verse securing'inember 34, mounted in the hub 33 and held against endwise movement by the part 50 of the plate 2. An abutment 35 cooperates with the uppermost portion of the rotor 32 and is held on the uppermost portion of the ring 7 of the stator by a tightening device 37 which may be a bolt and nut, a compressible packing 36 being interposed between the abutment 35 and the ring 7 of the stator. Obviously, by adjusting the tightening device 37, a proper cooperation between the abutment 35 and the rotor 35 may be obtained.

The rotor 32 is supplied with a transverse guideway 38 wherein a piston plate 39 is mounted for right line I'GClPIOCELtlOIL A blade 40 is slidably mounted in the outer end of the plate 39 and has a side arm 41 disposed radially of the rotor 32 and mounted to slide in a recess 42 fashioned in the piston plate'39 at one edge thereof. A guide pin 43 projects from the inner edge of the blade 40 and is slidably received in a correspondingly shaped opening 44 in the piston plate 39'. A screw 45'or the like is mounted in the arm 41 of the blade 40 and carriesa roller 46. The screw 45' and the roller 46 may be denominated a projection on the arm '41 0f the blade 40. a r

A bushing 47 is mounted in the piston plate 39 near one end'thereof, and in this bushing is received a pivotpin 48 secured by.

a' pin 49 to an annular rib 51 on a rotary member 52, in the form-of a plate, the rotary member or plate 52 cooperating with the plate 17 of thestator 1. The rib 51 on the rotary member 52 is received in'the annular groove 23 of the side plate 17. The rotary member52 embodies a hub 53 journaled the recess 24 of theplate 17. A shaft 54 projects from the hub 53 and is mounted to rotate in the bushing 28, the inner end -'of the bushing abutting against the hub 53. The rotary member 52 is equipped with a curved cam slot 55, receiving the roller 46 which constitutes a part of the projection on the .arm 41 of the blade 40. It is to be observed that the axesof the shafts 54 and 31 and, consequently, the axes of rotation of the rotor 32 and of the rotary member or plate 52 are oflsetwith'respect to each other and are non-alined.

7 When the shaft 31 is power-drivemthe rotor 32 will be turned about an axis represented by theaxis of the shaft 31. Rotation will be imparted to the rotary: member or 1 plate 52 through the instrumentality of the pivot pin 48 which is carried by the member 52 and is rotatably received in the piston plate 39, the member 52 turnin about an axis coincident with the axis of the shaft 54, it being recalled that the axes of the -shafts 54 and 31 are disposed out of alinement. Because the axes of the shafts 54 and 31 are disposed out of alinement, a right line sliding movement will be imparted to the piston-plate 39 to the'blade when the rotor 32 is operated, the piston plate sliding in the rotor, .andathei blade following the wall ofthe chamber 20, liquid being drawn through one of the ports 22 and being discharged through the other of the ports 22, depending upon the direction in which the member 32 is rotated. Under the back pressure ofliquidon the blade 40, the roller 46 may move a short distance, in; the slot 55 of the plate 52', and thus'thje edge-of the blade 40 is pressed continuously against the Wall of the chamber20, wear being taken up,

and a liquid-tight joint being effected at'a 1 point Where. such a joint is necessary.

Having thus described the'invention, what 7 is claimed i s1.

1. A pump comprising a stator; arotor and a rotary member j o'urnaled in thestator on relatively offset axes ;a piston slidable in the rotorand pivoted to the rotary member;

a bladeslidable in the piston andvcoacting With the stator; and mterengagmgielements advancing the blade toward the stator.

2. A pump comprising a stator; a rotor and a rotary member journaled inthe stator on relatively offsetaxes', the rotary member on the blade and on the rotarymember for f.

being provided with a cam; a piston slid'- able in the rotor and pivoted to the rotary member; and a blade slidable 1n the piston,

the blade being.provided vith a projection cooperating with the cam to'advance the blade with respect to the stator.

In testimony that I claim the foregoingas 'my own, I have hereto affixed: my signature 

